WO2016092908A1

WO2016092908A1 - Hydraulic device

Info

Publication number: WO2016092908A1
Application number: PCT/JP2015/073732
Authority: WO
Inventors: 浩二渡立
Original assignee: ダイキン工業株式会社
Priority date: 2014-12-09
Filing date: 2015-08-24
Publication date: 2016-06-16
Also published as: JP5858131B1; JP2016109075A; CN107002632A; CN107002632B

Abstract

Provided is a hydraulic device that can be produced at low cost and can be easily assembled. A first ring-shaped groove (116) is provided on the outer peripheral surface of a reaction force receiving member (106). Furthermore, a second ring-shaped groove (117) that faces the first ring-shaped groove (116) is provided on the inner peripheral surface of a recess (114) in a housing (101). A retaining ring (112) engages with the first and second ring-shaped grooves (116, 117). An engagement hole (212), which is engaged by the tip (112a) of the retaining ring (112), said tip (112a) being bent in an L shape, is provided in the reaction force receiving member (106).

Description

Hydraulic device

The present invention relates to a hydraulic device such as a variable displacement hydraulic pump, a fixed displacement hydraulic pump, a variable displacement hydraulic motor, and a fixed displacement hydraulic motor.

Conventionally, as a hydraulic device, there is a hydraulic pump including a swash plate support arranged in a bottomed cylindrical housing (see, for example, Japanese Patent Application Laid-Open No. 11-351134 (Patent Document 1)).

The swash plate support base supports the swash plate so that it can tilt. A piston that reciprocates in the housing faces the swash plate in the axial direction.

Also, the swash plate support is fitted into a recess provided on the inner surface of the bottom of the housing. More specifically, the swash plate support is inserted into the housing through an opening on the side opposite to the bottom side of the housing and fits into the recess. And an attachment bolt is inserted and tightened in the through-hole provided in the said swash plate support plate, and the movement of the axial direction of a swash plate support plate is controlled.

JP 11-351134 A

However, in the conventional hydraulic pump described above, since the axial movement of the swash plate support plate is restricted by a mounting bolt, it is necessary to provide a screw hole on the bottom surface of the recess.

Therefore, the above hydraulic pump has a problem that the processing cost of the housing increases and the manufacturing cost becomes high.

Also, when the axial movement of the swash plate support plate is restricted by a mounting bolt, a long tool is used and the mounting bolt is tightened from the opening opposite to the bottom side of the housing.

Therefore, the hydraulic pump requires a long tool for tightening the mounting bolt, and there is a problem that the assembly is troublesome.

Therefore, an object of the present invention is to provide a hydraulic device that can be manufactured at low cost and that can be easily assembled.

In order to solve the above problems, the hydraulic device of the present invention is:
A bottomed cylindrical housing;
A rotating shaft rotatably provided in the housing;
A cylinder block having a plurality of pistons that are rotatably provided around the rotation axis in the housing and reciprocate with rotation around the rotation axis;
A reaction force receiving member accommodated in the housing and receiving a reaction force for reciprocating the piston;
The housing has a recess on the inside of the bottom portion to which the reaction force receiving member is fitted,
The outer circumferential surface of the reaction force receiving member is provided with a first annular groove,
A second annular groove facing the first annular groove is provided on the inner peripheral surface of the recess,
A wire rod engages with the first and second annular grooves,
The reaction force receiving member has an engagement hole with which the tip of the wire is engaged.

Here, the “reaction force receiving member” refers to a member that supports the reaction force received by the swash plate, for example.

In addition, in this specification, the annular groove is not limited to an endless circle, but an endless circle, for example, a groove having a substantially arc shape of approximately 270 degrees is referred to as an annular groove.

According to the above configuration, when the wire is engaged with the first and second annular grooves, for example, the axial movement of the reaction force receiving member can be restricted without using a mounting bolt. Accordingly, since it is not necessary to provide a screw hole in the concave portion, the processing of the housing is reduced, and the manufacturing can be performed at low cost.

Further, since the mounting bolts need not be used, it is not necessary to use a long tool used in assembling the conventional hydraulic pump, and the assembly can be easily performed.

In addition, since the reaction force receiving member has an engagement hole with which the tip of the wire is engaged, the reaction force receiving member is swung with respect to the housing in a state where the tip of the wire is engaged with the engagement hole. By doing so, the wire can be easily engaged with the first and second annular grooves.

In the hydraulic device of one embodiment,
The engagement hole is provided at a position overlapping the first annular groove in the circumferential direction of the first annular groove.

According to the embodiment, since the engagement hole is provided at a position overlapping the first annular groove in the circumferential direction of the first annular groove, the tip of the wire is placed in the engagement hole. By simply engaging and pivoting the reaction force receiving member with respect to the housing, the wire is simply inserted between the first and second annular grooves in a squeezed manner. Engage with the annular groove.

In the hydraulic device of one embodiment,
The engagement hole is provided in a flat portion outside the first annular groove.

In the above embodiment, since the engagement hole is provided in the flat portion outside the first annular groove, it is easy to visually recognize the engagement hole, and the engagement between the engagement hole and the tip of the wire rod. Can be easily done.

In the hydraulic device of one embodiment,
The tip of the wire is bent into an L shape.

According to the embodiment, since the tip of the wire is bent in an L shape, the tip of the wire bent in the L shape can be easily inserted into the engagement hole, and the first annular groove Engage in the circumferential direction.

In the hydraulic device of one embodiment,
The housing has an opening that can face the engagement hole when the reaction force receiving member is rotated relative to the housing.

According to the embodiment, when the housing rotates the reaction force receiving member relative to the housing, the housing has an opening that can be opposed to the engagement hole, so that the reaction force receiving member is turned. In the previous state, the engagement hole is opposed to the opening, and the tip of the wire can be inserted into the engagement hole via the opening. Therefore, the workability of inserting the tip end of the wire into the engagement hole is very good.

In the hydraulic device of one embodiment,
The opening is a notch.

According to the above embodiment, since the opening is a notch, the opening can be prevented from being exposed to the outside of the housing, and a lid such as a plug can be eliminated from the opening.

In the hydraulic device of one embodiment,
It has a tapered surface that continues to one side of the notch.

According to the above-described embodiment, when the wire is assembled to the first and second annular grooves, the wire is guided by the tapered surface that is continuous with one side surface of the notch. Can be assembled smoothly into the groove.

In the hydraulic device of one embodiment,
An engaging member that engages the housing and the reaction force receiving member in the circumferential direction is provided.

According to the embodiment, since the engaging member engages with the housing and the reaction force receiving member in the circumferential direction, the reaction force receiving member is fixed to the housing in a non-rotatable manner.

In the hydraulic device of one embodiment,
The engaging member is provided at a position overlapping the wire in the circumferential direction of the first annular groove.

According to the embodiment, since the engagement member is provided at a position overlapping the wire in the circumferential direction of the first annular groove, the movement of the wire in the circumferential direction is restricted, that is, the wire. Can be prevented.

Therefore, the engaging member has a function of fixing the reaction force receiving member to the housing in a non-rotatable manner and a function of preventing the wire rod from rotating.

In the hydraulic device of one embodiment,
The dimension of the wire in the depth direction of the first and second annular grooves is substantially equal to the sum of the depth of the first annular groove and the depth of the second annular groove.

According to the embodiment, the dimension of the wire in the depth direction of the first and second annular grooves is substantially equal to the sum of the depth of the first annular groove and the depth of the second annular groove. Therefore, there is an advantage that the wire and the first and second

annular grooves

116 and 117 are closely engaged and do not rattle.

According to the hydraulic device of the present invention, the first annular groove is provided on the peripheral surface of the reaction force receiving member, and the second annular groove facing the first annular groove is provided on the inner peripheral surface of the recess. Since the wire is engaged with each of the first and second annular grooves, the movement of the reaction force receiving member in the axial direction can be restricted without using, for example, a mounting bolt. Therefore, since it is not necessary to provide a screw hole in the concave portion into which the reaction force receiving member is fitted, the processing of the housing is reduced, and the manufacturing can be performed at low cost.

Also, since the mounting bolts need not be used, it is not necessary to use the long tool used when assembling the conventional hydraulic pump, and the assembly can be easily performed.

FIG. 1 is a schematic sectional view of a swash plate type variable displacement hydraulic pump according to a first embodiment of the present invention. FIG. 2 is a schematic sectional view taken along the line II-II in FIG. FIG. 3 is an enlarged view of a portion in a circle C1 in FIG. FIG. 4 is a front view of a swash plate support as a reaction force receiving member. FIG. 5 is a side view showing a part of the swash plate support of FIG. 4 in a section in the XX direction. FIG. 6 is a cross-sectional view for explaining the process of assembling the retaining ring. 7 is a cross-sectional view in the YY direction of FIG. FIG. 8 is a schematic sectional view of a swash plate type fixed displacement hydraulic pump according to a second embodiment of the present invention.

Hereinafter, the hydraulic device according to the present invention will be described in detail with reference to the illustrated embodiments.

(First embodiment)
FIG. 1 is a schematic view of a cross section of a swash plate type variable displacement hydraulic pump as an example of a hydraulic device according to a first embodiment of the present invention, taken along a plane parallel to the axial direction.

The swash plate type variable displacement hydraulic pump includes a bottomed cylindrical housing 101, a rotating shaft 102, a cylinder block 103, a plurality of pistons 104, a swash plate 105, and a swash plate support as an example of a reaction force receiving member. And a table 106.

The housing 101 has a bottom portion 101a and a peripheral side portion 101b which is provided integrally with the bottom portion 101a and is continuous with the peripheral edge portion of the bottom portion 101a. An insertion hole 113 for inserting the rotating shaft 102 is provided in the bottom 101a. The rotating shaft 102 inserted through the insertion hole 113 is rotatably supported by the housing 101 via a bearing 109.

Further, a recess 114 into which the swash plate support 106 is fitted is provided inside the bottom 101a of the housing 101. That is, the housing 101 has a concave portion 114 in which the swash plate support 106 is fitted inside the bottom portion 101a.

On the other hand, a support plate 107 that holds the bearing 109 is fixed to the outer surface of the bottom 101 a of the housing 101 with bolts 108.

The cylinder block 103 is accommodated in the housing 101 and rotates integrally with the rotary shaft 102. The cylinder block 103 is provided with a plurality of cylinder holes 115 extending in the axial direction.

Each piston 104 is fitted in the cylinder hole 115 so as to be slidable in the axial direction. One end of the piston 104 on the swash plate 105 side is provided in a spherical shape, and a shoe 111 is attached to be tiltable. The shoe 111 is held by the retainer 311 and rotates together with the cylinder block 103 along the sliding surface 105 a of the swash plate 105 as the cylinder block 103 rotates.

Thereby, the piston 104 rotates around the rotation shaft 102 and reciprocates in the cylinder hole 115 as the cylinder block 103 rotates.

The inclination angle of the sliding surface 105a of the swash plate 105 with respect to the axial direction can be arbitrarily changed by tilting the swash plate 105 with an actuator (not shown). In addition, an insertion hole 151 through which the rotation shaft 102 is inserted is provided at the center of the swash plate 105.

The swash plate support 106 as the reaction force receiving member is provided to receive a reaction force received by the swash plate 105 for reciprocating the piston 104, and supports the swash plate 105 so as to be tiltable. An insertion hole 161 through which the rotating shaft 102 is inserted is provided at the center of the swash plate support 106. The swash plate support 106 is fitted in the recess 114 of the housing 101.

FIG. 2 is a schematic sectional view taken along the line II-II in FIG. FIG. 3 is an enlarged view of a portion surrounded by a circle C1 in FIG.

As shown in FIGS. 2 and 3, a first annular groove 116 is provided on the outer peripheral surface of the swash plate support 106. On the other hand, a second annular groove 117 facing the first annular groove 116 is provided on the inner peripheral surface of the recess 114. In addition, a tapered surface 118 having a diameter that increases as it approaches the swash plate 105 side is provided at the end of the inner peripheral surface of the recess 114 on the swash plate 105 side.

The swash plate type variable displacement hydraulic pump includes a retaining ring 112 as an example of a wire that engages with the first and second

annular grooves

116 and 117. As shown in FIG. 3, the retaining ring 112 has a substantially circular cross section, and the dimension of the circular cross section is the sum of the depth of the first annular groove 116 and the depth of the second annular groove 117. The retaining ring 112 and the first and second

annular grooves

116 and 117 are closely engaged to prevent rattling.

Although not shown in the drawing, the cross-sectional shape of the retaining ring may not be a circular cross section, but may be, for example, a rectangular cross section or a substantially elliptical cross section, and the cross-sectional dimension of the retaining ring is the depth of the first annular groove 116. And the depth of the second annular groove 117 may be smaller. In short, the retaining ring may be engaged with both the first and second

annular grooves

116 and 117.

The retaining ring 112 is made of, for example, metal having flexibility and elasticity, and has a substantially annular shape as shown in FIG. More specifically, the retaining ring 112 has an arc shape of approximately 270 degrees, and a tip 112a is bent inward in the radial direction in an L shape, and the tip 112a is radially inward from the outer peripheral surface of the swash plate support 106. Is engaged with an engagement hole 212 made of a blind hole having a circular cross section. The other portion 112b following the tip 12a of the retaining ring 112 has an arc shape with a central angle of about 270 degrees, and is engaged with the first and second

annular grooves

116 and 117 as shown in FIGS. Match.

As shown in FIG. 4, the engagement hole 212 is provided at a position overlapping the first annular groove 116 in the circumferential direction of the first annular groove 116. That is, the engagement hole 212 is located at the same position as the first and second

annular grooves

116 and 117 in the axial direction of the swash plate support 106.

The first annular groove 116 is not a complete circle, but is a ring-shaped end with a part missing, and the part with the part missing is a swash plate support as shown in FIG. A flat portion 136 is formed on the outer peripheral surface 106, and an engagement hole 212 is provided in the flat portion 136.

In the first embodiment, the engagement hole 212 is provided in the flat portion 136, but it may not be provided in the flat portion 136. For example, although not shown, the first annular groove is formed into a complete circle, that is, an endless ring shape, an engagement hole is provided in the first annular groove itself, and a guide for guiding the wire to the first annular groove is provided. A groove may be provided.

5, a curve G schematically shows the position of the bottom of the second annular groove 117 provided on the inner peripheral surface of the recess 114.

On the other hand, a notch 131 as an example of an opening is provided on the inner periphery of the housing 101 as shown in FIG. In the state of the finished product shown in FIG. 2, the notch 131 does not face the engagement hole 212, but when the swash plate support 106 is rotated relative to the housing 101, the notch 131 is formed in the engagement hole 212. It is possible to face each other.

That is, in a state before the assembly of the retaining ring 112 shown in FIG. 6 is completed, the engaging hole 212 and the front end 112a of the retaining ring 112 can be opposed to each other. In FIG. 6, the swash plate support 106 is pivoted with respect to the housing 101 as shown by an arrow A, and can be assembled in the state shown in FIG.

Further, as shown in FIG. 7, a tapered surface 141 connected to one side surface of the notch 131 is provided so that the retaining ring 112 can be smoothly guided by the tapered surface 141 when the retaining ring 112 is assembled.

On the other hand, as shown in FIG. 2, the swash plate support 106 is provided with a notch 120 for engagement extending in the radial direction, a screw hole 121 is provided in the housing 101, and the screw hole 121 is provided in the notch 120. The tip of a threaded plug 119 is engaged as an example of an engaging member screwed into the engagement. Thereby, the swash plate support 106 is fixed to the housing 101 so as not to rotate.

The notch 120 is provided at a position overlapping the first annular groove 116 in the circumferential direction of the first annular groove 116. That is, the notch 120 is at the same position as the first and second

annular grooves

116 and 117 in the axial direction of the swash plate support 106.

In this way, in FIG. 2, when the retaining ring 112 tries to move in the clockwise direction, the rear end 112c of the retaining ring 112 comes into contact with the threaded plug 119, and the retaining ring 112 is prevented from falling off.

Originally, the retaining ring 112 does not rotate in the rotation direction because the tip 112a is engaged with the engagement hole 212. However, for some reason, the engagement between the tip 112a and the engagement hole 212 is released. Even if the retaining ring 112 tries to rotate, the retaining ring 112 is prevented from rotating because the rear end 112c of the retaining ring 112 contacts the threaded plug 119.

As described above, the threaded plug 119 as an example of the engaging member has a function of fixing the swash plate support 106 to the housing 101 so as not to rotate and a function of preventing the retaining ring 112 from rotating.

According to the swash plate type variable displacement hydraulic pump configured as described above, the retaining ring 112 is engaged with the first and second

annular grooves

116 and 117 to restrict the axial movement of the swash plate support 106 with respect to the housing 101. Therefore, a conventional mounting bolt can be dispensed with, and a screw hole into which the mounting bolt is screwed does not have to be provided in the bottom surface of the recess 114, so that the processing of the housing 101 is reduced and the housing 101 can be manufactured at low cost. .

Further, since the mounting bolts need not be used, the mounting bolts need not be tightened with a long tool from the opening opposite to the bottom 101a side of the housing 101. Therefore, the swash plate type variable displacement hydraulic pump can be easily assembled.

Further, since the axial movement of the swash plate support 106 is restricted without using the mounting bolt, the axial length of the assembly composed of the swash plate 105 and the swash plate support 106 can be shortened.

If the mounting bolt can be inserted into the swash plate support 106 and the axial movement of the swash plate support 106 is restricted by the mounting bolt, the head of the mounting bolt comes into contact with the swash plate 105. In order to prevent this, it is necessary to increase the distance between the head of the mounting bolt and the swash plate 105. As a result, the axial length of the assembly composed of the swash plate 105 and the swash plate support 106 becomes long.

Next, in the swash plate type variable displacement hydraulic pump configured as described above, the retaining ring 112 is engaged with the first and second

annular grooves

116 and 117 to fix the swash plate support 106 and the housing 101 in the axial direction. The method will be described.

First, as shown in FIGS. 6 and 7, the engagement hole 212 of the swash plate support 106 is opposed to a notch 131 serving as an opening of the housing 101, and the L-shape of the retaining ring 112 is formed in the engagement hole 212. The tip 112a bent in a shape is inserted and engaged.

At this time, since the notch 131 as an opening is opposed to the engagement hole 212, the tip 112 a of the retaining ring 112 can be inserted into the engagement hole 212 via the notch (work space) 131. Therefore, the workability of inserting the tip 112a of the retaining ring 112 into the engagement hole 212 is very good.

Further, since the engagement hole 212 is provided in the flat portion 136 outside the first annular groove 116, the engagement hole 212 is easily visible, and the engagement hole 212 and the tip 112a of the retaining ring 112 are provided. Can be easily engaged.

Then, after the portion 112 b following the tip 112 a of the retaining ring 112 is aligned with the tapered surface 141 of the housing 101, the retaining ring 112 is wound around the swash plate support 106. At this time, as shown in FIG. 6, the retaining ring 112 is wound around the swash plate support 106 in a range of about 270 degrees from the front end 112a to the rear end 112c.

Next, the swash plate support 106 is turned in the direction of arrow A in FIG. Then, the retaining ring 112 is gradually and naturally inserted between the first annular groove 116 and the second annular groove 117 with the leading end 112a bent in an L shape at the top. As described above, the leading end 112a of the retaining ring 112 bent in an L shape is engaged with the engaging hole 212, so that the leading end 112a of the retaining ring 112 starts with the turning of the swash plate support 106. As described above, it is the engagement hole 212 that extends naturally between the first annular groove 116 and the second annular groove 117, that is, the tip 112 a of the retaining ring 112. This is because the first annular groove 116 overlaps with the first annular groove 116 in the circumferential direction. Thus, when the swash plate support 106 is turned about 270 degrees, the state shown in FIG. 2 is obtained. At this time, the retaining ring 112 is engaged with both the first and second

annular grooves

116 and 117.

In the first embodiment, the tip 112a of the retaining ring 112 bent in an L shape engages with the engagement hole 212 and is fixed in the circumferential direction, and the engagement hole 212 and thus the retaining ring 112 are fixed. Since the front end 112a is in a position overlapping the first annular groove 116 in the circumferential direction of the first annular groove 116, the front end 112a of the retaining ring 112 is simply engaged with the engagement hole 212 to support the swash plate. By simply turning the platform 106, the retaining ring 112 can be easily inserted between the first and second

annular grooves

116, 117 and engaged with the first and second

annular grooves

116, 117. it can.

Further, when the retaining ring 112 is assembled to the first and second

annular grooves

116 and 117, the retaining ring 112 is guided to the tapered surface 141 connected to one side surface of the notch 131 as shown in FIG. 7. The retaining ring 112 can be assembled smoothly.

Further, as shown in FIG. 6, the notch 131 as an opening in the housing 101 faces the engagement hole 212 before the swash plate support 106 is turned. The tip 112a of the retaining ring 112 can be inserted easily. In other words, the notch 131 provides a space for inserting the tip 112a of the retaining ring 112 into the engagement hole 212, so that the workability of inserting the tip 112a of the retaining ring 112 into the engagement hole 212 is extremely good.

Further, since the opening is the notch 131, the opening can be prevented from being exposed to the outside of the housing 101, and a lid such as a plug can be eliminated from the opening.

(Second Embodiment)
FIG. 8 is a cross-sectional view of a fixed displacement hydraulic pump according to a second embodiment as an example of a hydraulic device. In FIG. 8, the same or similar components as those of the swash plate type variable displacement hydraulic pump of the first embodiment shown in FIG. 1 are denoted by the same reference numerals as those of FIGS. With respect to the configuration and operation, FIGS. 1 to 7 and the description thereof are used, the redundant description is omitted, and only different components will be described below.

The second embodiment is different from the first embodiment only in that the swash plate 105 and the swash plate support 106 of the first embodiment are provided with a dual-purpose member 426 as a reaction force receiving member.

This dual-purpose member 426 is a reaction force receiving member having a function of a fixed swash plate whose inclination angle cannot be changed.

Since other operations and effects are the same as those in the first embodiment, description thereof will be omitted.

In the second embodiment, a long hole (not shown) as an opening that can face the engagement hole 212 may be provided instead of the notch 131 as the opening of the first embodiment.

In this specification, the hydraulic device refers to a device using hydraulic pressure such as a hydraulic device or a hydraulic device, for example, a variable displacement hydraulic pump, a fixed displacement hydraulic pump, a variable displacement hydraulic motor, a fixed displacement. It refers to hydraulic motors.

In the first and second embodiments, the dimension of the retaining ring 112 in the depth direction of the first and second

annular grooves

116 and 117 is equal to the depth of the first annular groove 116 and the second annular groove. Although it is substantially equal to the sum of the depth of 117, it may be smaller than the sum. As long as the retaining ring 112 is engaged with the first and second

annular grooves

116, 117, the retaining ring 112 may have any size.

In the first and second embodiments, the metal retaining ring 112 is used as the wire, but a rubber or resin retaining ring may be used, for example.

Further, in the first embodiment, the first annular groove 116 is an endless circular groove. However, for example, the first annular groove 116 is about 270 to which the retaining ring 112 having a center angle of about 270 degrees shown in FIG. It may be a circular arc-shaped groove.

In this specification, the annular groove is not limited to an endless circular shape, but an endless circular shape, for example, a substantially arc-shaped groove of about 270 degrees is referred to as an annular groove.

In the first and second embodiments, the engagement hole 212 is provided at a position overlapping the first annular groove 116 in the circumferential direction of the first annular groove 116. You may provide in the position which does not overlap in the circumferential direction. In this case, it is desirable to provide a guide portion such as a guide groove that guides the wire toward the engagement hole.

In the first and second embodiments, the engagement hole 212 is provided in the flat portion 136 outside the first annular groove 116 as shown in FIGS. 4 to 6, but the first annular groove 116 is provided. It may be provided at the position where it intersects itself, that is, the first annular groove 116. In this case, it is desirable to provide a guide groove communicating with the first annular groove 116.

In the first and second embodiments, the tip 112a of the wire 112 is bent in an L shape. Instead, the tip of the wire is a spherical bulge, and this bulge is used as a bulge. You may engage with an engagement hole.

Further, in the first embodiment, the tapered surface 141 that is connected to one side surface of the notch 131 is provided so that the retaining ring 112 can be smoothly guided by the tapered surface 141 when the retaining ring 112 is assembled. The tapered surface 141 may not be provided.

Of course, the constituent elements described in the first and second embodiments and modifications may be combined as appropriate, and may be selected, replaced, or deleted as appropriate.

DESCRIPTION OF SYMBOLS 101 Housing 102 Rotating shaft 104 Piston 105 Swash plate 106 Swash plate support stand 112 Stop ring 112a Tip 114 Recess 116 First annular groove 117 Second annular groove 119 Plug 121 Engagement member 212 Engagement hole 136 Flat part 141 Tapered surface 426 Combined member

Claims

A bottomed cylindrical housing (101);
A rotating shaft (102) rotatably provided in the housing (101);
A cylinder block (103) having a plurality of pistons (104) provided in the housing (101) so as to be rotatable around the rotation axis (102) and reciprocating with rotation around the rotation axis (102); ,
A reaction force receiving member (106, 426) received in the housing (101) and receiving a reaction force for reciprocating the piston (104),
The housing (101) has a recess (114) in which the reaction force receiving member (106, 426) is fitted inside the bottom (101a),
A first annular groove (116) is provided on the outer peripheral surface of the reaction force receiving member (106, 426),
A second annular groove (117) facing the first annular groove (116) is provided on the inner peripheral surface of the recess (114),
A wire rod (112) is engaged with the first and second annular grooves (116, 117),
The reaction force receiving member (106, 426) has an engagement hole (212) with which the tip end of the wire (112) is engaged.
The hydraulic device according to claim 1,
The hydraulic pressure device, wherein the engagement hole (212) is provided at a position overlapping the first annular groove (116) in a circumferential direction of the first annular groove (116).
The hydraulic device according to claim 2,
The hydraulic device according to claim 1, wherein the engagement hole (212) is provided in a flat portion (136) outside the first annular groove (116).
In the hydraulic apparatus as described in any one of Claim 1 to 3,
The hydraulic device, wherein the tip (112a) of the wire (112) is bent in an L shape.
In the hydraulic apparatus as described in any one of Claim 1 to 4,
The housing (101) has an opening (131) that can face the engagement hole (212) when the reaction force receiving member (106, 426) is rotated relative to the housing (101). A hydraulic device characterized by that.
The hydraulic device according to claim 5,
The hydraulic device according to claim 1, wherein the opening (131) is a notch (131).
The hydraulic device according to claim 6,
A hydraulic device having a tapered surface (141) connected to one side surface of the notch (131).
In the hydraulic apparatus as described in any one of Claim 1-7,
A hydraulic device comprising an engagement member (119) engaged with the housing (101) and the reaction force receiving member (106, 426).
The hydraulic device according to claim 8,
The hydraulic apparatus according to claim 1, wherein the engagement member (119) is provided at a position overlapping the wire (112) in the circumferential direction of the first annular groove (116).
In the hydraulic apparatus as described in any one of Claim 1-9,
The dimension of the wire (112) in the depth direction of the first and second annular grooves (116, 117) is such that the depth of the first annular groove (116) and the depth of the second annular groove (117). Hydraulic device characterized by being approximately equal to the sum of depth.